^Heywood 2012, p. 128: "Social democracy is an ideological stance that supports a broad balance between market capitalism, on the one hand, and state intervention, on the other hand. Being based on a compromise between the market and the state, social democracy lacks a systematic underlying theory and is, arguably, inherently vague. It is nevertheless associated with the following views: (1) capitalism is the only reliable means of generating wealth, but it is a morally defective means of distributing wealth because of its tendency towards poverty and inequality; (2) the defects of the capitalist system can be rectified through economic and social intervention, the state being the custodian of the public interest […]"

^Miller 1998，第827页: "The idea of social democracy is now used to describe a society the economy of which is predominantly capitalist, but where the state acts to regulate the economy in the general interest, provides welfare services outside of it and attempts to alter the distribution of income and wealth in the name of social justice."

^Badie，Berg-Schlosser & Morlino 2011, p. 2423: "Social democracy refers to a political tendency resting on three fundamental features: (1) democracy (e.g., equal rights to vote and form parties), (2) an economy partly regulated by the state (e.g., through Keynesianism), and (3) a welfare state offering social support to those in need (e.g., equal rights to education, health service, employment and pensions)."

^ 4.04.1Weisskopf 1992, p. 10: "Thus social democrats do not try to do away with either the market or private property ownership; instead, they attempt to create conditions in which the operation of a capitalist market economy will lead to more egalitarian outcomes and encourage more democratic and more solidaristic practices than would a more conventional capitalist system."

^Adams 1993, pp. 102-103: "The emergence of social democracy was partly a result of the Cold War. People argued that if the Stalinist Soviet empire, where the state controlled everything, showed socialism in action, then socialism was not worth having. [...] The consensus policies of a mixed and managed economy and the welfare state, developed by the post-war Labour government, seemed in themselves to provide a basis for a viable socialism that would combine prosperity and freedom with social justice and the possibility of a full life for everyone. They could be seen as a compromise between socialism and capitalism."

^Miller 1998，第827页: "In the second, mainly post-war, phase, social democrats came to believe that their ideals and values could be achieved by reforming capitalism rather than abolishing it. They favored a mixed economy in which most industries would be privately owned, with only a small number of utilities and other essential services in public ownership."

^Jones 2001, p. 1410: "In addition, particularly since World War II, distinctions have sometimes been made between social democrats and socialists on the basis that the former have accepted the permanence of the mixed economy and have abandoned the idea of replacing the capitalist system with a qualitatively different socialist society."

^Heywood 2012, pp. 125–128: "As an ideological stance, social democracy took shape around the mid-twentieth century, resulting from the tendency among western socialist parties not only to adopt parliamentary strategies, but also to revise their socialist goals. In particular, they abandoned the goal of abolishing capitalism and sought instead to reform or ‘humanize’ it. Social democracy therefore came to stand for a broad balance between the market economy, on the one hand, and state intervention, on the other."

^社会党国际-法兰克福宣言："3. Socialism aims to liberate the peoples from dependence on a minority which owns or controls the means of production. It aims to put economic power in the hands of the people as a whole, and to create a community in which free men work together as equals."

^社会党国际-原则宣言："1. The idea of Socialism has caught the imagination of people across the world, promoted successful political movements, decisively improved the lives of working men and women, and contributed to shaping the 20th century."

^社会党国际-法兰克福宣言："11.Socialism is an international movement which does not demand a rigid uniformity of approach. Whether Socialists build their faith on Marxist or other methods of analysing society, whether they are inspired by religious or humanitarian principles, they all strive for the same goal—a system of social justice, better living, freedom and world peace."

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